(1

1878

Ipomoea or Pharbitis nil

(observed on account of doubt whether Cot go on sinking late at night.)

Young seedling with Cots. observed under skylight. [sketch]

Jan 15th Cot fell rose from 8º a.m. to 12º; by 1º had fallen & continued till 10º 30' falling considerably: was then placed under Bell-glass in my Bed-room, continued to fall as observed at 11º 30' P.m, 1º 30' a.m (in night of 16th), 3º 30', 6º 30' — Was then removed to under skylight & at 8º 25' had risen a little, so turning point was between 6º 30' & 8º 25 a.m. (Used) Nevertheless it is doubtful whether trustworthy as seedling was poorly illuminated during all the 15th under the skylight, & temp, was low, only 15º to 15 1/2 C. After 8º 25 on the 16th continued rising but very little till 12º, by which time it began to fall & so continued all rest of day & the night; but the move movement was very small, as if plant paralysed.—

[in margin:] Apex of leaf 6 inches from vertical glass

Certainly seem to begin falling about noon, Whenever the rising rising may commence.— O

In text fall did not commence till 4º P.m Light another in obscure place, began descending at noon

(1 (2

Ipomoea nil

(Used)

(A new fine vigorous seedling with Hypocotyl 2 inches high secured to a little stick was observed kept all day in Hothouse so as to be well illuminated & placed at 4º 20' under skylight. (Temp. 19 3/4 C.) (see Tracing) & Cot, continued to fall till 10º 15, when plant was carried into my bed-room & placed under Bell-glass & movement traced twice during night. — Tracing joined to last; but the Tracing on following day (21st) (Temp. 19 1/2 C) not joined for too complex. —

By 12º 30' in night had risen a little & by 3º 45' considerably; but by 6º 12' a.m had fallen greatly.— Was then transferred to skylight & was observed from 12º 30' to 6º every 1/2 Hour ; & at other times about every Hour— The figure wd have been much mor complex, if observed half-Hourly for whole day. The course pursued wonderfully complex, & moreover very rapid: went up & down about 13 times between 6º 20' a.m & 10º 30' P.m

This is very interesting case, as shows that great & rapid & complex movement not connected with sleep.— Late in evening went far down this seem general rule, & rises during night,  apparently — between 10 & 11º after between 11 & 12º P.m. ─ I do not understand why course was so simple on evening of 20th The important point is falling till at least between 10º & near 11º P.m.

[in margin:] Apex of leaf only 4 1/8 from glass — approximately Horizontal Length of Cot & petiole. to tip of cot 1.6 inch.